America's -- And his fascinating look at nature starring two American bald Eagles they were spotted in a tree in Portland -- keenly. Stuck together. A different hours before -- eagle expert with a small camera on -- helmet was hoisted up by a bucket truck the birds weren't caught on anything in fact they were actually fighting over territory. Eventually they -- to school way. -- -- -- The Eagles people are fascinated -- Eagles players.

This transcript has been automatically generated and may not be 100% accurate.

Watch Real-Life Angry Birds Fight Over Territory

The birds fought for four hours, attacking each other with their talons.

Owl Attacks Bald Eagle Protecting Her Nest

Berry College's live video stream shows the owl swoop in for an attack.

Bald Eagle's Life Saved by Good Samaritan

A Washington man rushed the sickly eagle to the nearest veterinarian.

Bald Eagle Crashes at Oral Roberts University

The bald eagle was part of a special chapel service for students.

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